NEW YORK (AP) _ Stocks that were moving substantially or trading heavily Thursday on the New York Stock Exchange and Nasdaq Stock Market.

NYSE

Gap Inc., down $3.38 at $22.19

Several analysts downgraded the clothing retailer's stock after August same-store sales fell 14 percent.

J.C. Penney Co. Inc., down $1.19 at $14

The retailer warned that lower than-expected sales and heavy promotions will hurt its third-quarter earnings.

Lexmark International, up $7 at $66.50

A Salomon Smith Barney analyst upgraded the computer printer manufacturer's shares to ``buy'' from ``neutral.''

Target Corp., down $3.81 at $22.25

The retailer said it had sluggish department store sales during August, and predicted a a drop in its third-quarter earnings.

NASDAQ

Micros Systems, down $5.25 at $17.75

The information technology provider reported a loss of 45 cents per share for its fiscal fourth quarter, compared to earnings of 58 cents a year ago, and predicted a slowdown for rest of 2000.

Convergent Group Corp., up $2.08 at $6.94

The software company announced it obtained contracts worth more than $100 million year between February and August, compared to contracts worth $65 million in all of 1999.

Optio Software, down $81.2 cents at $3.06

The software maker's second-quarter loss was more severe than some analysts estimated. Also, a Merrill Lynch analyst downgraded the company's stock to ``long-term accumulate'' from ``buy.''

Corinthian Colleges, up $3.81 at $52.81

The company, which operates 37 for-profit colleges, reported fourth-quarter earnings that beat analysts' estimates.